Frame component



July 17, 1928,

F. AMIOT FRAME COMPONENT Filed Jan. 24

. i parts.

i scribed more'fully hereafter.

Patented July 11, 1928.

qUNITED' STATES [PATENT OFFICE.

FELIX minor, or COLOMBES, rnancn, sssmnon ro socm'ri: nnmnou'rrssacn am :on cons'rnnc'rrons nncamcnns," or commas, slmm, rmncn, s. manner: so-

GIETY.

Fauna 'comronnn'r.

Application filed January28, 1924, Serial No. 688,985,}!111 in Belgium April 8, 1988. I

This invention relates to frame components and refers more particularly although not exclusively to frame components or spars for use in the construction ofaircraft," as

6 that application appears to be the one of greatest importance.

The principal ob ect'- of the invention is so 1 to manufacture frame components or spars of thekind under consideration that the l material from which they are constructed is utilized to the greatest advantage, so that edges or flanges b, on opposite si es of the =tubes. w The cheeks may be of solid or continuous it resists strains and local distortion of the According to; the general principle of the 16 invention, one at least of the elements from which the frame component is constructed is formed tubular. I

The invention also refers to other constructional details, which are preferably utilized concurrently with the tubular element or elements, and which will be-de- It further refers to certain embodiments and applications es ecially the application of its principles-in t e construction of fixed or movable devices, and more particularly aircraft.

In order that'the invention may be more.

clearly understood, it will now be described :m with reference to the accompanying drawing, but it is to be observed that the description and drawing "are givenmerely byway of example.

36 of a spar for the main plane or wing ofan aeroplane constructed according; to the invention. J

Figs. 2 and 3 are end views of two other forms of frame components or spars con- 40 structed according to the invention.

'In constructing a s' ar for the win of an aeroplane, the proce ure is substantially as follows a. and b are trouglrshaped elements provided with lon itudinally extending outwardl turned edges or flanges a and b, so that the elements can be fitted together, one upon the other, with, the flan es in contact and so that in this sition t e inner cross so section is substantially circular. Fig. 1 shows two pairs of members a, b, forming two cylindrical portions or tubes.

The before mentioned members are so arranged that the flanges are substantially Fig. 1 is a perspective view of a portion? perpendicularto a plane passing through the'axes of the two cylindrical portions thus built up.

The axes may shape for the wing within which the spar is to be fitted.

' beparallel to -one another for may converge according to the desired a Av body ortion is also providedconnectmg .the tu ular members. This com rises two cheeks or side plates 0 with turne over edges or flanges 0 adapted to fit a ainst the the stays or dia onal elements so located that those 111.0116 irection withstandv compression whilst others withstand tension. I Supporting members a! may alsobe provided adapted to interconnect.at appropriate distances apart the tubular members and the cheeks. Each of the members (1 may for this purpose be so shaped that the tubular elements b havesupporting'them" ed es d on themembers d, whilst edges. or ang'es (1 support the cheeks. The members (1 may be of continuous metal or of. open' work like the cheeks.

After the parts have beenfitted together as above described, they are attached to one another man suitable manner, for instance 4 as indicated in the drawing, where rivets a are provided interconneetin the corresponding edges a, b and o, whilst the edges of the'members d are connected to the cornding checks by rivets f.

' %ith the foregoing construction, a. spar is obtained for an aeroplane in which any one of the tubular elements may be arranged to come at the upper portion. Insome' cases the parts which have the greatest strains to resist or which project, may have stituted by tubes attached by tubu ar rivets:

and in general the frame component orspar is adapted to resist the compression strains sustained by the upper portion of I strengthening elementswhich ma "be con-:,

iot-

- more bands or plates 9 riveted to the lower edges 0 of the cheeks and to the lower edges d of the members d which edges are then straight.

As regards the upper element, it is always formed tubular, but where the spar is to form a portion of a wing or plane of an' aeroplane of relativcly'small height, so that relatively high compression strains would have to be resisted. the spar may be provided with a plurality of tubular elements of the same character as the single element above described.

A construction of this character is illustrated at Fig. 3, in the case of which the upper member comprises three tubular elements, whilst the'lower member comprises only one. The construction is obvious from the drawing, so that it is unnecessary to give planes or wings of aeroplanes which have a certain thickness.

These planes furnished with s ars of this description respond particular y well to practical requirements.

As has already been mentioned the invention is not limited to the particular construction'al' embodiments which have been described but include all modifications coming within a fair interpretation of the claims.

The'upper and lower tubular elements of a spar may be connected in some other manner than that described.

What I claim as my invention and desiro to secure by Letters Patent of the United States of America is 1. A frame component or spar, comprising opposing spaced cheeks, opposing elements each provided with a plurality of mating channels forming together tubular members and with companion flanges on opposite sides of said channels, the cheeks being secured to the flanges on opposite sides of one of said tubular members, at one end, a connecting member secured to the other ends of the cheeks, and webs or buttresses connected to the outer taces of said cheeks, to said connecting member,- and to said channeled elements.

2. Acframe component or spar, comprising an upper tubular member and a lower tubular member, each composed of like channeled element-s fitted together and provided with companion flanges on opposite sides, said upper tubular member having associated therewith other tubular members on each side, cheeks located on opposite sides of the lower element of the upper member and the upper element of the lower member and connected to the flanges of said elements, and projecting webs or buttresses connected on the outside to said cheeks and upper and lower members.

In testimony whereof I hereunto ailix my signature.

" FELIX AMIOT. 

